Excavator-bucket mounting.



R. M. DOWNIE.

ExcAvAoR BUCKET MOUNTING.

APPLICATION FILED FEB. 25, I9I6.

Patented June 5, 1917.

2 SHEETS-'SHEET R. M. DOWNIE.

-ExCAvAToR BUCKET MOUNTING.

APPLICATON FILED 13.25.1916.

Patented J une 2 SHEETSAHEET 2.

lllllllJ mmHmHwlw IILJ.

, would result if the boom were `made up of changed and modified so long as suolik changes and modifications,y come Within the scope of the appended claims.

ln the drawings Figure 1 is a side elevation of the bucketk f and also showing the boom in crosseection.y

' Fig. e is a rear elevation of the bucketk with some parts connected thereto shown in cross-section. n

Fig.y is a section on theline 5 5 ofFig. 2 showing one slide and the corresponding portion of the boom, they f bucket `being omitted. f f y y Referring to the drawings', there is shown a boom 1, which in the particuleu form illustrated comprises spaced 1 beams Q connected at suitable intervals by plates 3, whereby the two l' beams are joined together to constitute the boom with the outside channels of the beams exposedL on opposite sides of thek boom.

1t willbe understood, of course, that they same effect so yfar as channelsare concerned channel beams, or were constructed` in any suitable way to provide tracks orchannels, for a purpose to bedescribed. There is alsoshown a bucket et, which, because of the manner ofoperation, maybe designated a scoop or shovel, being open at what constitutes the top and bottom in the operative position of the bucket, and also at the front, and having a dumping bottoni 5 joined to they front portion of the scoop or shovel by pivots 6. The front of the bottom 5 extends .beyond the front yof the scoop and there carries cutting teeth '7 rdesigned to enter they material to be excavated to loosen it, so that it may be directed into the interior of rthe scoop when the latter is moved over or skims the surface of suoli material. kThe bottom 5 is of such size as to permit rit to be moved into the scoop 4 through the bottom thereof to desired distances. rThe rear end of the bottom 5 carries'a latch plate 8 and a guard block 9, while shoes or runners on the under face of the bottom 5 serve to `.protect it from undue wear when movedr over or into the material to be excavated. The scoop is provided with a rear wall 11,

which mayor may not be in' one' piece with f the sides of the scoop. Extending about the rear end ofthe bucket at the upper edge of the back wall is a yreinforcing strip serving to stiifen yand otherwise strengthen the scoop. n

Secured to the outer or rear face ofthe back 11 is a latch lever 12 carried `by a bracket 13 fast to therearrwall of the scoop. and the latch lever is furnished with a series companion application.

meegaat of perforations 14 for the reception of a pivot bolt traversing the bracket 13, whereby the latch lever may be adjusted up and down s on the back of the scoop to hold the'fdumping bottoin in different positions of! inclination with respect to the body of the scoop. thus varying the inclination of the teethf Without correspondingly varying the body of the scoop. r1`he latch lever 12 is urged to the en aging positionby a spring 15 and is control ed by an actuating lever 16 adapted to be moved from adistance, as by a jerk rope or otherwise.

1n order to move the scoop it is provided With a U-bolt 17 secured to the rear wall 11 of. the bucket, or with any other suitable means whereby' a wire, rope or cable, or

other line, may be made fast to the bucket.y

So far as the construction of the boom and bucket is concerned, it may follow the saine lines asset forth in the aforesaid application,

kand no claim is made herein to the construc tion of the` bucket per se, since claims to such construction are made in the aforesaid Secured 'to the inner faces of the outer marginal webs of the boom are track strips 18 heldthereto by rivets 19 or otherwise, so

that these strips may be renewed from timek to time by knocking off the heads of the rivets, removing the Worn strips, and re# placing them with unworn strips Whichinay ybe riveted to the boom the same as the original strips were fastened thereto. The'strips 1S may be made of steel and require renewal but occasionally, since f kthe Wear of such strips affects rthem but slowly. s

Adapted to each side channel of the boom is a slide composed yof an 'elongated spacer rbar 20 carrying adjustable wedges Q1. The

spacer bar is shown as tapering. in width from the ends toward thecentral portion. al though such particular direction of taper is not obligatory. .Each wedge 21 is in the form of a taper block corresponding to the taper of the spacer bar, so that the spacer bar is supported intermediateljvv of the track stripslS with one edge of each wedge block engaging` the corresponding taper portion of the spacer bar, andthe other edge of the wedge block engaging the corresponding track strip 18 with the edges engaging the track strips substantially parallelr one With' the other.v 1n this way the slide, which, as will presently appear, constitutes the bucket support, is capable of being moved lengthwise of the boom in relatively snug lit to the tracks 18, but without bindinor thereto. At the thick end of each wedge block 21 there is a plate let into the block and se` cured thereto by vscrews Q3 or in` any other appropriate manner; The plate has one end 24 projecting beyond 'the thick end of the wedge block and there traversed by a set screw 25 entering one of a series of tapped ing arranged in series lengthwise of the bar annessa sockets 26 in the spacer bar, the sockets benear the intermediate or narrow portion thereof;

Each spacer bar near its ends carries a transverse guide strip 27 Overlapping the corresponding narrow ends of the wedge blocks 2l, so as to prevent any pivotal action of the wedge blocks .on the single screws 25 each holding a plate 22 to the spacer bar.

Secured to each spacci' bar near what constitutes the front end thereof is one leg of a hanger t28 secured to and rising from the inner tace ot' the rear wall ll of the bucket, with the legs of the hanger so spaced as to be exterior to the outer faces of the two slides when properly lodged in the channels of the boom. Each leg ot1l the hanger bracket 28 contains a longitudinally extended series of holes or perforations 29 for the reception of a. stud bolt 30 held in place by a nut 3l and having a stud extension 32 entering the front end portion of the spacer bar 20. The stud bolts 30 and perforations 29 permit the adjustment of the hanger bracket 28 to raise or lower the bucket with reference to the beam.

The bracket 28 serves to maintain the front end ot' the slides in the track channels of the boom. rlhe'rear ends or the slides are similarly maintained by a yoke 32 secured to the spacer bar near its rear end by bolts 33 which may also be stud bolts. 'lhese bolts eachtraverse one web of a corresponding angle brace bar 34 extending and connected to the bucket near the bottom thereof by a bolt 35 or otherwise. 'lhese brace bars serve to hold the bucket against pivotal action about the stud bolts 30 with the slides or bucket supports in the main located to the rear of the scoop or bucket. The brace bars 34 are reinforced by cross brace strips 3G made tast at spacedrpoints to the brace bars, and they are further reinforced by a bolt 37 extending through the brace bars near their rear ends. rlhe yoke 32 is held against swinging movements about the stud bolts 33 by a link 38 connecting the yoke 32 at a point about midway of its length to the bolt 37 at a point about midway of the length of the latter.

1With a slide and supporting means therefrom to the bucket or scoop, the latter is earried b v the rear end only and may be tilted with respect to its line of travel along the boom. At the same time wear in the slide, which is liable to occur between the wedge blocks and the track strips, is readily taken up as becomes necessary by adjusting the wedges toward the corresponding ends of the spacer bar, this being accomplished by removing the screws Q5 and replacingthem in the next sockets 26 in order. The sockets are. staggered on opposite sides of the spacer bar on the same side of the mid point thereor, so as not to interfere one with the other, and so as to-y provide many adjustments. iVith this arrangement the wedge blocks on, say, the top ot the spacer bar may be adjusted to take up wear, and when adjustment is again needed the wedge blocks on the bottom of the. spacer bar may be so adjusted, and so on until no more adjustments lare provided for. yBy this time the wedge blocks have become worn so thin that new wedge blocks are needed, and these may be provided at small cost, restoring the slide or carrier to substantially` its original condition. The track strips 18 will out wear many sets of wedge blocks, which latter are made of wood or other material of an antifriction nature with respect to the steel track strips, so that renewal or the track strips is of infrequent occurrence. Moreover, the track strips protect the webs of the boom from all wear, and hence no renewals so far as the boom itself are concerned, are needed. A

The slides permit the maintenance of the lit betweenthem and the boom in such condition that undue lost motion need not occur, nor need there be undue friction between the slides and the boom. Because of such arrangement the scoop is readily moved along the boom by ower when the boom is in a substantially orizontal position, so that the scoop will engage a roadway or other surface to remove accumulations oi dirt or to grade the surface, and when the scoop is illed it is only necessary to tilt the boom in a manner to elevate the frontend of the bucket, and then swing the boom to one side or the other to a point of disposal of the dirt contained within the scoop, the latter ,being readily dumped by means of the dumping bottom. The elevation of the boom correspondingly elevates the scoop, which in the operation ot the dredging machine has in its active movement been drawn to near the front end ot' the boom, the/other end of the boom being suitably mounted on the body of the dredging machine. This means that when the boom is elevated the scoop is relatively high inthe air, and to return it to a low position close to the dredging machine it is only necessary to slacken the line by which the scoop is moved forwardly, whereupon the scoop will gravitate to the lower position, because the slides need not engage the tracks with such frictional torce as to prevent such gravitating movement.

What is claimed is 1. In an excavating machine, the combination with an elongated boom having longitudinal runways and a scoop or shovel supported by the boom and movable lengthwise thereof. of a supporting slide structure. for the scoop or shovel adapted to the runways of the boom, said slide structure ineluding spacer bars and shoes on the spacer bars engaging in the runways andy slidable therealong, a supporting connection between one end of the spacer-bar portion of the slide structure and the rear end of the scoop or shovel, and brace bars between the other end of the spacer bar portion of the slide structure and the rear end of the scoop` or shovel. ,y f

2. ln an excavating machine, the com bination with an elongated'boom having longitudinal runways and a scoop or shovel supported by the boom and movable length# V shovel, the supporting connectionbeing in e the form of a hanger secured to the upper portion of the rear end ot thebucket and the brace bars being connected to the bucket near the lower portionl of they rear end of the bucket.

3, ln an excl vating machine, ythe combinationfwith an elongated boom having' longitudinal runwaysgand a scoop or shovel supported by the boom and movable lengthc wise thereof, ot a supporting slide structure for the scoop or shovel adapted to the runways of the boom, said slide y'structure including spacer bars and shoeson the spacerk bars engaging in the runways and slidable therealong, a supporting connection between one end of the spacer-bar portion 'of Vthe slide structure and the rear end of the scoop or shovel, and brace bars between the other end of the spacer bar portion ofthe slide structure and the rearendof the scoop orf shovel, the supporting connection beingy secured to the upper endy ot the 'rear of the bucket and having :nijustabley connections to the corresponding end ot the spacerbar portions of the slide, and the brace bars hav-` ing pivotal connections at oppositeends to the spacer bar parts ot the slide and the lower portion ot the rear end of the bucket,

respectively. f

4. ln an excavating machine, the combination with an elongated boom having-channel runways on opposite sides and a scoop or shovel supported by the boom and mov'- able lengthwise thereof, of a slide structure for supporting the bucket comprising slides f adapted to the runways on the boom, each slide consisting olf an elongated spacci' bar increasing in width from the mid portion toward the ends, and wedge blocks or shoes onand adjustable lengthwise of the spacery naasea bar to maintain a snug lit of the slide in the respective runway by [compensating for wear, y

5. ln an excavating machine, an elongated boom having channel runways on oppositey sides, an excavating scoopk or shovel, slides adapted to the respective runways and each f comprising an `elongated spacer bar tapering from the ends toward the middle pory tion, wedge blocks securedto and adjustable along the taper portions of the spacer bar, hangers connected tothe front ends of the sides, an excavating scoop or shoveladapted to move lengthwise or" the boom, elongated slides and to the rear end of the scoop, and

slides each adapted to a respective runway of the boom and comprising an elongated rspacer bar tapering from thel ends toward the middle portion, and elongated wedge blocks adjustable lengthwise of thek taper portions of the spacer bar, a suspension member connected to the front ends of the spacer bars and maintaining the slides in the channel runways of the boom, and brace bars each connected at one end to the respective, spacer bar near the rear endet the latter and at the other end connected 7. ln an excavating machine, an elongatedk sides, an kexcavating scoop or shovel adapted to move lengthwise ot the boom, elongated slides each vadapted to a respective runway of the boom and comprising an to the rear end of the scoop or bucket adjacent to the bottom of' the latter.

yboom having channel' runways on opposite elongated spacer bar tapering from the ends toward the middle portion and elongated wedge blocks adjustable lengthwise of the taper portions of the spacer bar5 a suspen-y sion member connected to the front ends of the spacer bars and maintaining the slides in the channel runways of the boom, and brace bars each connected at one end'to the respective spacer bar near the rear end ot f the latter andat the other end connected to therear end "of the scoop or bucket adjacent to the bottom of the ylatter, the rear ends ol' the spacer bars being also kconnected by a yoke for maintaining said rear ends of the spacer bars in the runway channels of the boom. y y

8. ln an excavating machine, the combination with an elongated boom having opposite runway channels therein, and an exea vating scoop or shovel adapted to be carried by and moved lengthwise of the boom, ot a supporting structure for the scoop or shovel having elongated slides adapted to the respective runways on opposite sides of the boom, each slide comprising an eloniic gated spacer bar tapering from the ends toward the central portion, wedge blocks 'adapted to the taper portions of the spacer bar with'each wedge block and the spacer bar having coacting means for the adjustment of the wedge lengthwise of the spacer bar, and supportingjconnections between the spacer bar and thescoop.

9. In an excavatingmachine, a boom hav-l ing runways, and an excavating scoop or shovel mounted on 'the boom and provided' with slides entering the runways and supporting the scoop, said slides having adjustable members for maintaining a snug iit 'in the slides and runways.

10. lln an excavating machine, a boom having longitudinal runways with removable tracks therein, and an excavating scoop 0r shovel movable lengthwise of the boom and provided with supporting slides adapted to the runways and tracks, each slide comprising a spacing bar to which the scoop is connected, and shoes removably secured to the spacing bar on the top and bottom thereof and provided with adjusting means, whereby wear of the shoes may be taken up to maintain a suitably snug t of the shoesI on the track.

11. In an excavating machine, a boom having channels on opposite sides constituting runways, and an excavating scoop or shovel carried by and movable lengthwise of the boom, the carrying means for the scoop including slides movable along the runways in the boom and having means for expanding the runway-.engaging portions of the slides laterally of the boom to compensate for wear. n

12. In an excavating machine, a boom having channels on opposite sides constituting runways, and an excavating scoop or shovel carried by and movable lengthwise of the boom, the carrying means forv the scoop including slides movable along the runways in the boom andhaving means for expanding the runway-engaging portions of the slides laterally of the'boom to compensate for wear, said runway-engaging portions oit the slides comprising readily renewable shoes of fibrous material of antifriction characteristics with respect to the material of the runways.

13. ln an excavating machine, a boom having longitudinal channels constituting runways, and an excavating scoo or shovel hung from the boom and movagl wise thereof and provided with elongated slides adapted to the channels in the boom, said slides each comprising a spacer bar carrying the scoop, and wedge-shaped shoes ot wood removably attached to the spacer bar and adjustable lengthwise ot the latter to take up wear.

e length-l 14. In an excavating machine provided with a scoop-supporting boom having elongated runways, an elongated scoop-carry'- ing slide structure adapted to the runways and having shoes thereon slidable in the runways and adjustable to vary the width of the part of the slide structure engaging the runways to compensate for wear. l

15. In an excavating machine.- provided with a scoop-supporting boom having elongated runways, an elongated scoop-carrying slide structure adapted to and movable along the runways and having elongated shoes thereon slidable in the runways and adjustable at an angle to both the length and width oi" the slide structure-to vary the width of that part of the slide structure engaging the runways to compensate for wear.

16. In an excavating machine provided` with' a scoop-supporting boom having elongated runways, an elongated scoop-carrying slide structure Ahaving intermediate parts to which the scoop is secured, and elongated shoes on the intermediate parts engaging the runways, the shoe portion of the slide structure having means provided for adjustment to vary the width of the slidable structure in the runways to compensate for wear.

17. ln yan excavating machine, the combination with a boom having longitudinal runways, of a slide structure mounted in and, movable lengthwise of the runways, and a scoop suspended from the slide structure at points spaced apart lengthwise of said slide structure.

18. ln an excavating machine, the combination. with a boom having longitudinal runways on opposite sides, ot slides in the respective runways, and a scoop suspended from the slides at points on each slide spaced apart in the direction of the length of the slide.

19. lin an excavating machine, the combination with a boom having longitudinal channels on opposite sides, elongated slides mounted in the channels, and a scoop suspeded from opposite end portions of each sli e.

20. ln an excavating machine,-the combination with a boom having longitudinal channels on opposite sides, elongated slides mounted in the channels, and a scoo suspended from opposite end portions o` each slide, each slide having adjustable `wooden wear blocks engaging corresponding portions ot the runways.

In testimony, that I claim the fore oing as my own, I have hereto axed my signature in the presence of two witnesses.

RGBERT M. DUWNE. Witnesses N. G. FORBES, CHARMES TMG. u 

